When my roommate and I had a kitty quite some time ago, we had a minor earthquake. All of a sudden, the cat went berserk and started running all over the house and meowing. We had no idea what was going on until we heard on the news that there was an earthquake.

Luckily, I didn't have Maxx when that large earthquake hit Seattle last year, which we felt quite strongly here in Vancouver. I think all kitties go crazy when one hits, even if their humans can't feel it. They have much more heightenend senses than we do.